Just adding on to that- Most of the scene is lit either too brightly, or from the wrong side, if it's being lit by the moon. The grass behind the rock, for instance, would catch little to no light, as the rocks are obstructing it from the light.

The softness look comes from the shading, since you said you wanted rocks, and not dirt, which is what it looks like now (and pretty good btw), then you need to define the edges of the rocks more, leave abrupt edges on the rocks where the light won't hit, 'rocks' are usually thought of as more jagged than smooth. (However they can be, it's just about the style you're looking for, I believe making them more jagged would give them that 'rocky' look.)

Also, I'm not sure about that dark red (and gray!?) for the bottom of the mountain, I don't believe it's helping the piece, maybe you should go a lot more towards dark brown, and define it a little bit more down there.
 And it looks like your light source is coming directly from the top-center, so, the sides of the mountain should naturally be a little more defined (lit up) than the side that is facing us . I think you would benefit from moving it a little (or a lot) to the left or right as well, as thing generally look more interesting, and it would probably help in removing that soft, 'pillowy', look as well.

I think the fact that she's looking at the plant (and not really facing it, looking at it from the sides of her eyes) helps add to the mysteriousness/awkwardness of the picture. Also little uncommon things, such as having an oddly lifted finger, add to that as well. And, maybe you should make her hair brown?

Okay, something's strange here. The Sun/Moon is behind her, yet she's being illuminated in the front, with shadows in the back? That doesn't make any sense.

And that Cyclops thing is cool, however, I'd only light it around it's edges, so it looks like a silhouette.

It looks really great, unique retro-ish style. I guess you could use an extra highlight and/or shadow, but it's fine as it is, and definitely not required.

But if you say you wanted it tiled like you do, then, I propose making a seperate version of the top 3 tiles, moving them down, if you wish to eliminate the gap.